Bolt-head-trimming machine.



Patented July 2, 1912.

6 SHEETS-SHBET 1.

R. H. SMITH.

BOLT HEAD TRIMMING MACHINE. I AiPLIOATION FILED SEPT. 6, 1910. 1,03 1 ,094.

R. H. SMITH.

BOLT HEAD TRIMMING MACHINE.

APPLICATION FILED SEPT. 6, 1910.

w T Z w gm m M W PVE'in @60' e 6' R. H. SMITH.

BOLT HEAD TRIMMING MACHINE. APPLICATION FILED SEPT. 6, 1910.

1,031,094. I Patented July 2, 1912.

6 SHEETS-SHEET 3.

R. H. SMITH.

BOLT HEAD TRIMMING MACHINE.

APPLIOATION FILED SEPT. 6, 1910.

Patented July 2, 1912;

6 SHEBTSSHBBT 4.

WM fi/KWW fizveniar 2 '4 m4) R. H. SMITH.

BOLT HEAD TRIMMING MACHINE.

APPLIOATION FILED SEPT. 6, 1910.

' 1,031,094. Patented July 2,1912.

6 SHBETS-SHEET 5.

(ST 3547M R. H. SMITH.

BOLT HEAD TRIMMING MACHINE.

APPLICATION FILED SEPT. 6, 1910.

Patented July 2, 1912.

6 SHEETS-SHEET 6.

ROY E. SMITH, 0F CLEVELAND, OHIO.

BOLT-HEAD-TRIMMING ivmonmn.

Specification of Letters Patent.

Application filed September 6, 1910. Serial No. 580,618.

To all whom it may concern:

Be it known that I, ROY H. SMITH, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvements in Bolt Head Trimming Machines, of which the following is a full, clear; and exactds'ciiption.

This invention relates to improvements in automatic bolt head trimmers and particularly to machines for trimming circulai heads of bolt blanks into square, hexagonal or other polygonal shape.

The,object of this invention is to provide an automatic bolt head-trimmer which is efficient; is economical in the power required to operate the same, particularly in the opconstructed'that none of theparts are eration of the die holding slide; which is constructed particularly with a view of insuring safety to the operator; which is so liable to get out of order or be broken; which does not require expensive tools, particularly dies and punches; which delivers the bolts after being trimmed or operated on in a manner such that the bolts and chips are separated; and which can be operated continuously and with great rapidity.

These and other objects are accomplished by my invention which may be briefly summarized as consisting in certain novel details of construction and combinations and arrangements of parts which will be described in the specification and set forth in the appended claims.

In the drawings, Figure 1 is a side elevation of an automatic bolt head trimmer constructed in accordance with the preferred form of my invention; Fig. 2 is a plan view of the same with, certain portions omitted for the sake of clearness; Fig. 3 is an end view of the same; Fig. 4 is a longitudinal vertical sectional view of the same; Fig. 5 is a transverse section on the irregular line 55 of Fig. 2, looking in the direction indicated by the arrow; Fig. 6 is a transverse section onthe line 6-6 of Fig. 2, looking in the directionindicated by the arrow.

Before describing the machine in detail, the following brief preliminary description of the arrangement and operation of some of the main parts may be given to facilitate the understanding of the construction. The machine constructed in accordance with the preferred form of my invention includes a opening corresponding punch which is provided with an opening into which the shanks of the bolt blanks are adapted to be inserted, mechanism for'delivering the blanks one at a time to the punch and inserting the'shanks thereof in the punch opening, a die which by its cooperation with the punch trims the heads of the blanks, and a knockout or mechanism for delivering the blanks from the punch and die after the heads of the blanks have been trimmed. In this case the die is carried by a slide which is reciprocated in the bed of the" machine, but instead of arranging the punch in fixed position with reference to the movable die and at all times in alinementtherewith, the punch is carried by a movable die block, which is preferably reciprocated in a vertical plane and when the punch is above the die and die slide, the former receives a 'bolt blank and is then lowered with the head of the blank projecting from the end of the punch opening, until it is in alinement with the die and between the die and the knockout mechanism. The head of the blank is then trimmed and the blank is forced from the punch. and die by the knockout mechanism before the die is retracted and before the punch is moved upwardly preparatory to receiving another blank.

Referring now to the figures of the draw- Patented July 2, 1912.

ing, 10 represents the machine bed which is supported on legs 1'1 and is provided near one end with a crank shaft 12 from which all the working parts of the machine are operated and which is provided with a combined fly wheel and belt pulley 13. Arranged centrally of the bed is a slide 14 which is reciprocated in the guideway of the bed by means of a pitman 15 and is provided at its forward end with a die block 16, which is adjustably secured in position by bolts and wedge shaped members 18 shown most clearly in Fig. 2, and is adapted to receive and support a die 17 having a die to, or substantially to, the shape to be given the heads of the bolt blanks. That is, if the heads are to be square or are to have any other number of sides, the die opening will be shaped accordingly. The opening of the die 17 communicates with the interior of the slide 14, which is hollow and is 0 on at the" bottom, as

shown in Fig. 4. he guideway for this slide 14 is formed, as shown most clearly in Figs. 5 and 6, by parallel side walls of the bed, inwardly pro ecting ledges or flanges 19 which are engaged by the bottom of the slide and by overhanging portions of two plates or castings 20 and 21 which are; secured to the top of the bed and which are to bereferred to presently. j

Arranged forwardly of the die block and die slide is a movable punch block 22 which, as here shown is arranged to slide vertically in a vertical guideway of the bed so that the punch carried by thev punch block will at the upward limit of movement be above the die slide and at its lower limit of movement be in alinement with the die. The punch block 22 is rovided near its upper end with a forward y projecting portion 22 to which is secured by a cap 22", a punch 23 having an opening therethrough of a size sufficient to receive the shanks of the bolt blanks. At the rear of the punch 23 is a punch adjusting screw 24 whichis provided with an opening of the same size as the open ing' in the punch and in alinement therewith; Extending into the opening of the adjusting screw 24 is a pin 25 hereafter called the knockout pin which, when moved forwardly,

by means to be referred to presently, delivers the blank after the head thereof has been trimmed, from the unch, forcing the -same forwardly through t e die 17 into the hollow die slide. A coil spring 25 whichsurrounds the pin 25 and is located between the head thereof and the end of the adjusting screw 24 returns the pin 25 to normal position after it has been moved forwardly. The pin 25 projects into a narrow vertical slot near the end of the bed, which slot is covered by plate 27. The punch block 22 is provided also with-a rearwardly projecting portion 22 in which is secured an adjustable set screw 28 adapted by its-engagement with the bed to limit the downward movement of the punch block and to cause the punch to be brought into exact alinement with the die.

' This portion ofthe punch block is also provided with an opening through which loosely passes a bolt 29 which is screwed into the ed and at its upper end is provided with a stop nut 29 which limits the upward movement of the unch block.

. The punch bloc is given the vertical reciprocating movement abovereferred to by mechanism includin a cam -member 30 which is secured to t e crank shaft 12, and an arm 31 which at its rear end is provided with an elongated slot loosely engaged by the crank shaft, and is provided between its ends with a roller 31* which engages within a cam groove 30 on the inner face of the cam member 30-. This arm 31 extends downwardly and forwardly and its lower end is pivotally' connected to a lever 32 which is secured to the outer end of a rock shaft 33 rotatably supported at the bottom of the bed shown in Figs. 1 and 4, the part- 34 being between the parts 34 and being connected to the latter by means of a pin 3 1 which, if anything, such as one of the bolt blanks should clog the machine, will shear and preventsome costly part or parts of the machine from breaking orbeing damaged.

Having described the construction and movements of the die and punch and the members which carry the same, I shall now describe the mechanism for delivering the blanks to the punch, and also more fully the mechanism for causing the delivery of the blanks from the punch and die after the heads have been trimmed or operated on. The blanks are supplied by the operator to a hopper or so-called fountain 36 comprising two downwardly curved or inclined plates 36, 36 which are spaced apart a sufficient distance to accommodate the shanks of the blanks which are placed on the fountain with the shanks extending downwardly and with the heads above the plates engaging the top edges of the same. Pivoted guards or guides36 which are carried by a member 36 connecting the two plates are employed to keep the blanks in proper positions, and

to prevent part of the blanks crowding othersupwardly or outwardly.

The fountain is preferably supported by means of a bracket 37 which is adjustably secured to the fountain near the lower end thereof by means of a bolt 37 passing through an elongated slot in the end of the bracket,-tl1e latter being adjustably secured by means of a bolt 37 in a slide or guideway 20 of the plate 20 which is s ecured to the top of the bed.and, as before stated, forms part of the guideway for the die carrying slide 14.

.The blanks are delivered from the lower end of the fountain into grooves or recesses of fingers 38, constituting a so-called cup which is secured to the inner end of a transversely movable slide 39 arranged to move in a guideway formed by a transverse groove in the plate 20 and by a cap 2O secured on the latter. This slide is utilized for conveying the blanks one at a time from the lower end of the fountain inwardly to a position where the blank is grasped by fingers to be referred to presently and lifted from the cup. so that the slide may then more outw'ardly to receive another blank.

is engaged by aroller 40 carried by theend of a lever 41 secured to one end of a rock shaft 42, (see Fig. 5) which is supported from the bed by a bracket 43, and is provided at its opposite end with alever 44' connected to the slide 39. The roller 40 is held in engagement with the face of the cam groove by means of a coil spring 45 connected at one end to the bed and at its opposite end to the lever 44.

A stop pin 46 (see F ig. 2) carried by the slide 39 limits the inward movement of the slide and brings the same to a position such that the blank carried by the cup can be grasped and lifted therefrom by a pair of fingers 47 and 48 pivotally connected to a lever 49. These two fingers are pressed yieldingly toward each other by a coil spring 50, an adjustable screw 51 fixing the position of the finger 47. The lever 49' is secured to one end of a rock shaft 52 which is rotatably supported in bearings carried by the plate 21, which as previously stated, is bolted to the top of the bed 10. At the opposite end of the rock shaft 52 is a lever 53 which is connected by a link 54 to a lever 55 secured to one end of a rock shaft 56 which is supported by a bracket 57 and has connected to its opposite end a downwardly projecting'lever 58 provided at its lower end with a roller 59 which engages a cam face on thesside of a cam member; 60 'motmt- ,ed on the shaft12 (see Figs. 2, 3, 4 and 5).

This cam 60 is so formed that when the slide 39 carries a blank inwardly, the rock shaft 52"-is' turned in such a way as to lower the fingers 47 and 48 over and onto the blank so that the latter is grasped by said fingers, the fingers having near their lower ends oppositelycurved or recessed portions constituting jaws which will recelve and grasp the blank when the fingers are lowered. After the blank is, grasped in this manner, the fingers are raised .until the blank is free of the cup on the end of the slide 39 so that the latter can again be moved outwardly, after which the fingers are again swung downwardly so that the blank is held directly in line with the opening in the punch 23 when the punch block 'is in its upper. position and is located not only in line with the opening in the punch, but in line also with a so-called reciprocating pusher 61 (see Figs. 2, 4 and 5) which is designed to engage the head of the blank and by its forward movement push the blank the'full distance of the shank into the opening of the punch. WVhen the fingers 47 and 48 are swung downwardly so. as to bring the blank to the position above stated, they are brought to a dead stop with the blank the 'proper. position by the engagement of a lug 53 on the lever 53 with an adjustable stop screw 53 carried by an upwardly projecting arm of the plate 21. A

spring 62 holds the roller 59 against the cam face of the cam member 60.

The pusher 61 which, as before stated,

shifts the blank into the opening of thethe vertical portion of the plate 21 extending lengthwise of the bed just above the die slide, as shown veryclearly in Fig. 5,wherein the slide 64 is'shownin section.' The slide 64 is moved back and forth at proper intervals by mechanism including an arm 65 which is connected at its forward end to the slide and at its rear end isconnected to a lever 66 secured to one end ofa rock shaft 67 supported in a bracket 68 secured to the end of the bed, the rock shaft having at its opposite end, as shown particularly in Figs. 2, 3 and 4, a downwardly projecting lever 69 provided with an elongated slot in which is adjustably secured one end of a rod 70,

videdwith a' roller 72 which engages the cam face of a cam member 73, see Figs. 2, 3 and 4, the cam being so sha ed as to cause the pusher 61 to be moved orwardly so as to transferv a blank from the jaws of the fingers 47 and 48 into the opening of the punch and then to be retracted. The roller 72 is held yieldingly against the face of the cam 73, in this case by two springs 74 and 75, the former being connected at one end to the lever 66 and at its opposite end to the outer end of an arm 76 loosely connected to the bed, the spring being connected at one end to thesame arm and'at the opposite end to a stationary pin 77 secured to the bed. These two springs and the pivoted'arm 76 are employed in order that sufiicient spring length can be obtained in a convenient manner. When. the pusher is moving the blank into the opening of the punch, the fingers 47 and 48 are moved upwardly to the position" shown in-Fig. 5, so that said fingers will be in position to grasp another blank when the slide again moves inwardly.

From the mechanism so far described, it will be seen that the blanks are fed from the fountain one at a time into the cup of the slide 39 and at each movement of the in the punch 23, the latter being moved upwardly in line with the pusher 61 just before or at substantially the same time that the blank was-lowered by the fingers. Im-

mediately after the blank is in the position stated, the usher moves forwardly pushing the blank'mto the opening of the punch, and then as the pusher moves backwardly and as the fingers 47 and -18 are retracted, the punch block is moved downwardly until the punch and the blank carried thereby are in line with the oncoming die 17 carried by the die block 16' at the end of the die slide 14. The downward movement of the unch block and the forward movement of t e die slide takes place simultaneously, and immediately after the die block is in its lowermost position, the die engages and trims the head of the blank into the proper shape.

After the head is formed, the next step performed by the machine is the extraction or delivery of the blank from the 'punch and die. This is accomplished by mechanism including a reciprocating knockout or v ram 78 consisting in this case of a rack bar which is in alinement with the die and with the knockout pin when the punch block bers or projections 88 an face of the cam member 30, prevlously reend with a second pinion 81 which is en-.

gaged by a gear segment 82 secured to one end of a rock shaft 83 supported'by the bed and having secured to its outer end'a lever 84, to the free end of which is pivotally connected an arm 85 which extends forwardly of the machine on the outside'of the bed and is provided on its forward end with an elongated slot 86 which loosely engages and is adapted to slide on the crankshaft and is provided between its ends with a roller 87 which is engaged by a air of cam mem- 89 on the outer ferred to. These cam members 88 and 89 V arebcst shown in Figs. 1, 2 and 3.

With the mechanism just described, immediately after the head of each blank has been-trimmed, the knockout 78 shifts .the

blank forwardly through the unch and die,

into the open space of the ie" slide, from which it may drop downwardly through the bed. By forcing the blanks entirely through the die, not only are the heads neatly and accurately trimmed or formed, but the blanks are separated from the chips, the blanks being delivered in one receptacle located underneath the bed and the chips falling in another receptacle which may be placed beneath the bed, the chips dropping on one side of the die and the blanks on the opposite side.

It will be noted that by the provision of the. reciprocating punch block which is moved at right angles to the movement of the die and by the provision of the mechanism for placing the blanks into the punch opening when the punch and die are out of alinement, only a short stroke need be given and scope of my invention'as hereinafter claimed.

Having thus described my invention, what I claim is:

1. In a machine fortrimming bolt heads, a bed, a die and a punch supported by the bed, the punch having an opening adapted to receive the shank of the bolt, means for giving said punch and die, a relative movement to and from a position of alinement, means for supplying a bolt tothe punch opening when the die and unch are out of alinement, and means for giving said punch and die a relative reciprocating movement axially of the die to trim the bolt heads.

2. In a machine for trimming bolt heads, a bed, a die and a punch supported bythe bed, the punch havlng an opening adapted to receive the shank of a bolt, means for giving said punch and die a relative reciprocating movement laterally with respect to the axis of the die to and from a position of alinement, means for supplying a bolt to thepunch opening when the die and punch are out of alinement, and means for giving said punch and die a relative reciprocating movement axially of the die.

3. In a machine for trimming bolt heads, a*bed, a die member and a punch member supported by said bed, the punch member havmg an opening adapted to receive the shank of a bolt, means for reciprocating one of said members vertically with respect to the other to and from the position of alinement therewith, means forsupplying a bolt to the opening of thepunch member when said members are out of alinement, and means for reciprocating one of said members horizontally to trim the bolt heads.

4. In a machine for trimming bolt heads, a die, a punch having an opening extending therethrough, means for shifting said punch with respect to the axis of the die to and from a position of alinement with the latter,

means for supplying a bolt to the punch opening when the punch is out of alinement with the die, and means for giving said punch and die a relative reciprocating movement to trim the bolt heads.

5. In a machine for trimming bolt heads, a die, a punch having an opening extending t-herethrough, means for reciprocating said punch laterally with respect to the axis of the die to and from a position of alinement therewith, means for supplying a bolt to the punch opening when the punch is out of alinement with the die, and means for giving said punch and die a relative reciprocating movement to trim the bolt heads.

6. In a machine for trimming bolt heads, a bed, a die member and a punch member supported by said bed, the punch member aving an opening adapted to receive the shank of a bolt, means for reciprocating one i of said members laterally with respect to the other to and from the position of alinement therewith, means for supplying a boltto the opening of the punch member when said members are out of alinement, and means for reciprocating the die horizontally to trim the bolt heads.

7. In a machine for trimming bolt heads, a bed, a die and a punch supported by said bed, the punch having an opening adapted to receive the shank of a bolt, means for reciprocati'ng said punch vertically with respect to the die to and from the position of alinement therewith, means for supplyinga bolt to the opening of the punchwhen said punch and die are out of alinement, and means forreciprocating the die horizontally to trim the bolt-heads,

8. In a machine for trimming the heads of bolt blanks, a bed, a die and a punch supported thereby, a .reciprocating'member carrying the die, a member carrying the punch and movable with respect to the axis of the die to and from a position of alinement therewith, means for supplying to the punch.

opening the shank of a bolt blank when the punch and die are out of alinement, and means for forcing the blank through the die after the head thereof has been trimmed.

9. In a machine for trimming the heads of bolt blanks, a bed, a die and a punch supported thereby, a reciprocating member'car rying the die, a reciprocating member carrying the punch and movable at right angles with respect to-the axis of the die to and from a position ofalinement therewith,.

means for supplying to the punch opening theshank of a bolt blank when the punch and die are out of alinement, and means for forcing the blank through the die after the head thereof has been trimmed.

10. In a machine for trimming the heads of bolt blanks, a reciprocating die and a reciprocating knockout device in alinement therewith, a movable punch havingan opening adapted'to receive the shank of a bolt blank, means for shiftingsaid punch with respect to the axis of the die to and from a position of alinement therewith, means for supplying to the punch opening a bolt blank when the punch is out of alinement with the die, means for reciprocating the die so as to trim the head of the blank, and means for reciprocating the knockout device for forcing the blank from the punch and die after the head of the blank has been trimmed.

11. In a machine for trimming the heads of bolt blanks, a reciprocating die and a reciprocating knockout device in alinement therewith, a punch having an opening adapted to receive the shank of a bolt blank, 7

device for forcing the blank from the punch and through the die after the head of the blank has been trimmed.

12. In a machine for trimming the heads of bolt blanks, a bed, a die, a movable die block carrying the same, a reciprocating knockout device in alinement with the die, a punch having an opening extending therethrough, a movable punch block carrying said punch, means for reciprocating the punch block so as to shift the punch to and from a position between and in alinement with the die and knockout device, means for inserting the shank'of a blank in'the punch opening when the punch is in its outermost position, means for reciprocating the die block and die, and means for reciprocating the knockout device so asto trim the head of the blank when the punch is in its innermost position and to then force the blank through the die.

13. In a machine for trimming the heads iof bolt blanks, a bed, a horizontally reciproeating die, a horizontally reciprocating knockout device in alinement with the die, a

vertically reciprocating punch having an opening extending therethrough, means for reciprocating the punch so as to shift the same to and from a position between and inalinement with the die and knockout device, means for inserting the shank of a blank in the punch opening when the punch is in its uppermost position, means for re ciprocating the die, and means for reciprocating the knockout device so as to trim the head of the blank when the unch is in its lowermost position and to t en force the blank through the die.

' 14. In a machine for trimming the heads of bolt blanks,-a bed, a die, and a unch supported by the bed, the punch avmg an opening extending therethrough, said punch being movable with respect to the axis of the die to and from a position of alinement with the latter, a movable device adapted to insert the shank of a blank in the punch opening, means for shifting said punch from a bolt blank in the opening of the position in alinement with the die to a position in alinement with said blank inserting means, and means for giving said punch and die a relative reciprocating movement to trim the head of the blank.

15. In a machine for trimming the heads of bolt blanks, a bed, a die, a punch having an opening-extending therethrough, a reciprocating device for inserting the shank of a unch, a fountain adapted to be supplied wit blanks, means for conveying the blanks one at a time from the fountain to a osition in alinement with the blank inserting device, means for reciprocating the punch to a position in alinement with the die to a position in alinement with said blank inserting means, means for actuating said inserting device so as to insert the shank of a blank in the punch opening when the punch is in alinement therewith, and means for actuating the die to trim the head of the blank ghen the punch is in alinement with said 16. In a machine for trimming the heads of bolt blanks, a bed, a horizontally recip rocating die, a vertically reciprocating punch having'an opening extending therethrough, a fountain adapted to be supplied with lanks, a horizontally reci rocating pusher arranged above the die and adapted when actuated .in one direction to insert the shank of a blank in the punch opening,

means for conveying blanks one at a time from the fountain to a position in alinement with said usher, means for reciprocating the punch said pusher to a position in alinement with the die, and means for reciprocating said die so as to trim, the head of the blank when said punch and die are in alinement.

17. In a' machine for trimming the heads of bolt blanks, a bed, a reciprocating .die, a reciprocating knockout device in allnement with the die, a reciprocating punch adapted to be shifted at substantially right angles to the movement of the die and knockout device, a fountain adapted to be supplied with bolt blanks, a reciprocating pusher adapted to insert the shank of a blank in the punch opening, means for reciprocating the punch from a position between and in alinement with the punch and die toa position in alinement with the pusher, means for recipro-- eating the usher so as to insert the shank of a blank 1n the punch opening, means for actuatin the die so as to trim the head of the blan when the punch is between the die and knockout device, and means for actuating the knockout device so as to force theblank through the die when the head of the blank has been trimmed.

In testimony whereof, I hereunto aflix my signature in the presence of two witnesses.

ROY H. SMITH. Witnesses:

H. R. SULLIVAN, A. J. HUDSON.

om a position in alinement with a 

